Author:
Fu Shing Yiu,Francis Kareem Jamaal Garriga,Chong Mervin Lim Pac,E Yiwen,Zhang X.-C.
Abstract
We observe a hundredfold enhanced, directional second harmonic generation as a fundamental beam focuses into a laser-induced air plasma. The enhancement, detectable even with pulses beyond 6 ps, is highlighted among concurrent second harmonic processes.